The bugs were found at her caretaker’s home in Hanover, Pennsylvania, crawling on her bed, on walls and basically all over the place.

The official cause of death for Mary Stoner, which occurred on February 22, was "complications of sepsis following a bed bug infestation". The 72-year old caretaker, Debora Butler, was charged on Friday with involuntary manslaughter and neglect of care.

The massive infestation was clearly visible when authorities visited the place where both women lived. Another person who was also under Butler’s care said she could “feel them crawling” on her. She was not able to see the vermin due to the fact that she is blind.